Perhaps you should try some spelling variations:
petroiiv » petrov (Expand Search), peteroiiv (Expand Search), petrioiiv (Expand Search), petruoiiv (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petruoiiov » peteruoiiov (Expand Search), petriuoiiov (Expand Search), petruuoiiov (Expand Search)
petriv » peteriv (Expand Search), petriiv (Expand Search), petruiv (Expand Search)
petriu » peteriu (Expand Search), petriiu (Expand Search), petruiu (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop ((((petriov OR petruoiiov) OR peterov) OR (petriv OR petroiiv)) OR (petriu OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petriov OR petruoiiov) OR peterov) OR (petriv OR petroiiv)) OR (petriu OR petr)) o.s.*".